Swing motor mounting arrangement and method of disassembly

ABSTRACT

A swing motor has a shaft rotatably mounted in a housing thereof with the shaft projecting beyond each end of the housing. A support bracket and a frame are positioned on opposite sides of the motor and have a pair of overlapping bracket arms, positioned at each end of the motor, pivotally mounted together. A pin projects through each pair of bracket arms and is secured to one of the bracket arms and to a respective end of the shaft.

United States Patent 1191 Jackson et al.

14 1 Sept. 18, 1973 [54] SWING MOTOR MOUNTING 3,405,823 10/1968 Williams214/138 C ARRANGEMENT AND METHOD OF 3,081,891 3/1963 Przybylski 214/138R DISASSEMBLY 3,608,930 9/1971 Moriceau 214/138 C 3,627,155 12/1971 VanDer Zyl 214/138 [75] Inventors: James S. Jackson, Peoria, 111.; Paul S.2,978,116 4/1961 Wells et a1 212/68 Lempio, Sausaliw, m: 3,153,37310/1964 Gies et a1. 214 138 R [73] 'Assignee: Caterpillar Tractor Co.,Peoria, 111. Primary Examiner charles w. Lanham [22] Filed: Mar. 3, 1972Assistant Examiner-James R. Duzan 21 Appl. No.: 231,705 fi'lffffyi i ."TP

[57] ABSTRACT 52 us. c1 29/464, 214/138, 287/100 A swingwirib'wri has'Ehaft rotambly mounted in a 51 1m. 01 B231 3/00 h si h r f with the shft Pr je ting beyond each [58] Field 61 Search 29/464; 248/289, n of thehousing- A pp bracket and a fr me re 248/291; 287/100 X; 74/105; 212/68;positioned on opposite sides of the motor and have a 214/138 R, 138 C,138 XR; 308/189, 207 pair of overlapping bracket arms, positioned ateach end of the motor, pivotally mounted together. A pin [56] ReferencesCited projects through each pair gf braoiggt arrr and is UNITED STATESPATENTS secured to one of the bracket arms and to a respective 3,270,8949/1966 151116088311. 212/66 and ofthe h 2,994,446 8/1961 Auwelaer et al214/138 C 30 Claims, 5 Drawing Figures 14 30; 2 1 1 1 up i r 20 18 I 1543 l 24 i 22 PATENTED SEP I 8 I975 SHEEI 2 [If 3 \m a Z r.) a M M [Q 7 N4 A Il ll .[0 a h J b m b 2 4 4 H a 2 4 SWING MOTOR MOUNTING ARRANGEMENTAND METHOD OF DISASSEMBLY BACKGROUND OF THE INVENTION Backhoes nonnallycomprise a vehicle having a support bracket mounted thereon and a mastframe swingably mounted on the support bracket about a verticallydisposed pivot axis. A hydraulically actuated swing motor is positionedbetween the support bracket and frame to selectively pivot the frameduring hoeing operations. A common problem with such motors is theinability to expeditiously detach the motor for repair or replacementpurposes. Conventional motor mounts are generally complex, resulting inconsiderable downtime to effect such repair or replacement.

SUMMARY OF THE INVENTION An object of this invention is to overcome theabove, briefly described problems by providing an economical mountingfor a swing motor which exhibits a high degree of structural integrityand is adapted for expeditious installation and removal.

The motor comprises a shaft mounted therein for relative rotation and asupport bracket and a frame normally positioned on opposite sides of themotor to have a pair of overlapping bracket arms thereof pivotallymounted together by pivot means. The pivot means comprises a pin meansprojecting through each pair of overlapped bracket arms, positioned atopposite ends of the motor, and secured to only one of the bracket armsand to a respective first or second end of the shaft.

This invention also comprises a method for expeditiously disassemblingand reassembling the motor. Such method includes the steps of moving thepin means axially relative to the connected shaft. In one embodiment,the method steps include securing a bolt to a threaded aperture formedthrough a pin until the bolt engages the motor shaft. Upon furtherrotation, the bolt will function to move the shaft axially away from thepin to disengage a spline connection thereof. Upon reassembly, anotherbolt is threadably attached to the shaft and pulled to draw the shaftinto the pin to reconnect the spline connection.

Brief Description of the Drawings Further objects of this invention willbecome appar ent from the following description and accompanyingdrawings wherein:

FIG. 1 is a side elevational view of a swing motor mounting arrangementof this invention; and

FIGS. 2-5 are views similar to FIG. 1, but illustrating alternativeembodiments of this invention.

DETAILED DESCRIPTION FIG. 1 illustrates a swing motor mountingarrangement comprising a vertically disposed swing motor 11 ofconventional design having a housing 12 rotatably mounting a shaft 13therein. The shaft has exposed first and second ends 14 and 15,respectively, preferably projecting axially beyond respective ends ofthe housing. The shaft may have at least one vertically disposed vane(not shown) attached thereto in a conventional manner to pivot the shaftand housing relative to each other.

In particular, the operator'controlled motor may be selectively actuatedvia suitable control valves (not shown) to communicate a pressurizedfluid, such as oil,

within the housing. The oil functions to rotate the shaft relative tothe housing to thus rotate a mast frame 16 relative to a stationarysupport frame 17 of a backhoe. The support frame is normally mounted ona rear end of a tractor (not shown) whereas the mast frame normallypivotally mounts a boom 18 and a vertically displaced rod 19 of ahydraulically actuated cylinder thereon.

The cylinder is operatively connected to the boom to selectively lowerand raise it, whereas the boom further mounts a conventional dipperstick and bucket assemblage thereon (not shown). In addition, thehousing of motor 11 is preferably attached to support bracket 17 bybracket assembly 20, although :in certain motor applications the housingcould be attached to mast frame 16 to rotate therewith and relative toshaft 13. l

The support bracket comprises vertically displaced single bracket arms21 and 22 positioned within overlapped, bifurcated bracket arms 23 and24, respectively, secured to mast frame 16. Thus, a pair of overlappingbracket arms are positioned at each axial end of the motor to extendlaterally beyond shaft 13. Upper and lower pivot means 25 and 26pivotally mount each pair of overlapping bracket arms together andfurther comprisemeans for quickly disconnecting the motor from themounting arrangement.

Upper pivot means 25, for example, comprises a two part pin meanssecured to upper shaft end 14 by a bolt means 27 extending axiallytherethrough. The pin means comprises a tubular inner pin 28 and acylindrical outer pin 29 circumventing the inner pin. The inner pinpreferably has an unsplined, frustoconically shaped cutout 30 formed inits lower end 31 which mates with a like configured shaft end 14.

The inner pin terminates at its upper end at an annular flange 33 whichis secured to an annular flange 34 of outer pin 29 by radially disposedbolts 35. In turn, flange 34 is attached to an upper bracket arm 23 byradially disposed bolts 36. A collar of bracket arm 21 of backhoesupport bracket 17 pivotally mounts outer pin 29 therein by a standardannular bearing means 37.

The pin means for lower pivot means 26 comprises a single pin 40attached to a lower bracket arm 24 by bolts 41, extending through aflange 42 thereof. The pin extends upwardly through overlapped bracketarms 22 and 24 and is secured to lower end 15 of shaft 13 by a splineconnection 43. An annular thrust bearing 44 is disposed between housing12 of the motor and the upper end of pin 40. The pin is pivotallymounted in a collar of bracket arm 22 by an annular bearing 45.

When it is desired to remove motor 11 for repair or replacementpurposes, bracket 20 is uncoupled from housing 12, bolts are removed anda puller (not shown) is coupled to inner pin 28 at the threaded holesfor bolts 35. The method steps for such removal comprise first movingfirst pin means and first shaft end 15 axially relative to each other todisconnect them by simultaneously moving second pin means 28 and shaft13 axially outwardly away from the first pin means. Second pin means isthen further moved axially outwardly to disconnect second pin means fromsecond shaft end 14.

It should be noted that such first and second moving steps comprisemoving the same pin means 28. Bolt 27 is thereafter detached from uppershaft end 14 and pin 28 is removed therefrom. Upon removal of motor 11,it should be noted that bearings 37 and 45 are not disturbed. Thus, suchremoval method substantially reduces the down time normally requiredwith respect to the disassembly of conventional mountings.

FIGS. 2-5 illustrate additional mounting arrangement embodiments a, 10b,10c and 10d, respectively, of this invention wherein like numerals areemployed to depict corresponding constructions and parts. Numeralsemployed in FIGS. 2-5 are accompanied by the letters a through d todepict alternative structures.

Referring to FIG. 2, a swing motor 11a comprises a housing l2a having ashaft 13a rotatably mounted therein. Exposed first and second shaft ends14a and 15a, respectively, preferably project beyond respective ends ofthe housing with the upper end being connected to a hollow inner pin 28aat a spline connection 310. The inner pin terminates at its upper end atan annular flange 33a secured to an annular flange 34a of an outer pin29a of the pin means by bolts 35a. Flange 34a is attached to upperbracket arm 23 by radially disposed bolts 36a.

Bracket arm 21 of backhoe support bracket 17 is pivotally mounted onouter pin 29a by a standard annular bearing 37a of integrated upperpivot means 25a. The pin means for a lower pivot means 26a comprises asingle pin 40a attached to a lower bracket arm 24 by bolts 41a,extending through flange 42a thereof. The pin extends upwardly throughoverlapped bracket arms 22 and 24 and is secured to a lower end 15a ofshaft 13a by a spline connection 43a. The pin pivotally mounts bracketarm 22 of backhoe support bracket 17 thereon by a standard annularbearing 45a.

The method for removing motor 1 In for repair or replacement purposes,comprises detaching bolts 35a, attaching a puller (not shown) to innerpin 28a and moving it upwardly to disconnect it from upper shaft end 14aat spline connection 31a. A bolt (not shown) is then threadably attachedat a threaded opening means 46, formed axially through pin 40a, and isrotated to abut the lower end of shaft 13a. Further rotation of the boltwill function to move shaft 13a and motor lla' axially upwardly todisengage them from pin 40a at spline connection 43a.

When it is desired to reassemble motor 11a, the above sequence isreversed, but is initiated by first attaching a bolt (not shown) to athreaded second opening means 47 formed on lower shaft end 15a. A puller(not shown) maybe attached to such bolt to pull shaft 13a downwardly tore-engage the shaft with pin 40a at spline connection 430. It should benoted that the diameter of opening 47 is smaller than the diameter ofopening 46 to permit the bolt engaging threaded opening 47 to be freelyinserted through opening 46.

The FIG. 3 embodiment comprises a swing motor 11b having a housing 12brotatably mounting a shaft 13b therein. An outer end 14b of the shaft isconnected to the hollow lower end of a single solid pin 28b at splineconnection 311;. A separate bracket member 33b is attached to an upperbracket arm 23 by bolts 35b to normally overlie and prevent the pin frommoving axially upwardly. An annular bearing 37b pivotally mounts bracketarm 21 of support bracket 17 on, the pin. The illustrated mountingarrangement is duplicated at the lower end of the swing motor assembly.

The FIG. 4 embodiment comprises a motor 110 having a housing 12crotatably mounting a shaft 130 therein. A hollow upper end 140 of theshaft is splined at 310 to a tubular pin 28c. The pin terminates at itsupper end at a flange 33c secured to an upper bracket arm 23 by bolts35c. An annular bearing 37c rotatably mounts bracket arm 21 of supportbracket 17 on the pin. The illustrated mounting arrangement isduplicated at the lower end of the swing motor assembly.

The FIG. 5 embodiment comprises a swing motor 11d having a housing 12drotatably mounting a shaft 13d therein. An upper end 14d of the shaft issplined at 31d to the lower, hollow end of a pin 28d. The upper end ofthe pin has a flange 33d secured to an upper bracket arm 23 by bolts35d. The FIG. 5 embodiment essentially differs from the FIGS. 3 and 4embodiments in that an annular sleeve bushing 48, disposed between abearing 37d and pin 28d, is press-fitted or otherwise suitably securedto vertically spaced bracket arms 23 to permit the pin to be movedupwardly therethrough upon release of bolts 35d.

The swing motors illustrated in FIGS. 3-5 may be suitably removed byreleasing bolts 35b, 35c and 35d, respectively, to permit the respectivepins to be moved axially away from the connected motors by a suitablyattached puller (not shown).

What is claimed is:

l. A swing motor mounting arrangement comprising a motor having ahousing and a shaft mounted therein for relative rotation therewith,first and second ends of said shaft exposed at opposite ends of saidhousing, a support bracket and a frame normally positioned on oppositesides of said motor and having a pair of overlapping bracket armspositioned at each axial end of said motor to extend laterally beyondsaid shaft, and pivot means pivotally mounting each pair of saidoverlapping bracket arms together, including a pin means projectingthrough said pair of bracket arms and secured to only one of saidbracket arms and to a respective first or second end of said shaft.

2. The invention of claim I wherein the first and second ends of saidshaft project axially beyond respective ends of said housing.

3. The invention of claim I wherein said support bracket has the housingof said motor attached thereto and said frame constitutes the mast frameof a backhoe having a boom and a vertically spaced, hydraulicallyactuated cylinder each pivotally mounted thereon.

4. The invention of claim I wherein each bracket arm of said frame isbifurcated and each bracket arm of said support bracket is positionedwithin a respective one of the bifurcated bracket arms, said pivot meansfurther comprising annular bearing means pivotally mounting each pinmeans on a respective bracket arm of said support bracket.

5. The invention of claim 1 wherein at least one of said pin means issecured to a respective end of said shaft by a spline connection.

6. The invention of claim 5 wherein each of said pin means is secured toa respective end of said shaft by a spline connection.

7. The invention of claim I wherein a pin means is secured to the firstend of said shaft by bolt means extending axially through said pinmeans.

8. The invention of claim 1 wherein at least one of said pin meanscomprises an inner pin secured to the first end of said shaft and acylindrical outer pin circumventing said inner pin and attached to saidinner pin and to the bracket arm of said frame, said outer pin pivotallymounted on the bracket arm of said support bracket.

9. The invention of claim 8 wherein said inner and outer pins eachterminate at their outer ends at an annular flange respectively attachedto said outer pin and to the bracket arm of said frame.

10. The invention of claim 8 wherein the other one of said pin meansconstitutes a single pin secured to the second end of said shaft and tothe other bracket arm of said frame.

11. The invention of claim 10 wherein said single pin is secured to thesecond end of said shaft by a spline connection and is pivotally mountedon the other bracket arm of said frame.

12. The invention of claim 1 wherein at least one of said pin means hasmeans forming a threaded opening therethrough to expose a respective,adjacent end of said shaft for permitting a bolt to be threadablyattached therein and rotated to move such pin means and said shaftaxially relative to each other.

13. The invention of claim 12 further comprising means forming athreaded second opening in said adjacent end of said shaft, axiallyaligned with and having a smaller diameter than said first-mentionedthreaded opening, for permitting a bolt to be threadably attachedtherein for pulling said shaft and pin means together.

14. The invention of claim 1 wherein each of said pin means constitutesa single solid pin connected by a spline connection to a respective endof said shaft.

15. The invention of claim 14 wherein the inner end of each of said pinsis hollow at its spline connection to said shaft.

16. The invention of claim 14 wherein each end of said shaft is hollowat its spline connection to a respective pin.

17. The invention of claim 14 further comprising a separate bracketmember attached to each of the bracket arms of said support bracket tooverlie a respective end of said shaft to prevent axial movement of saidshaft.

18. The invention of claim 14 wherein an outer end of each of said pinshas a flange formed thereon, attached to each of the bracket arms ofsaid support bracket.

19. The invention of claim 14 further comprising on axially extending,annular bearing disposed between each of said pins and a respectivebracket arm of said frame.

20. The invention of claim 19 further comprising an annular sleevebushing disposed between each of said bearings and a respective pin,each of said sleeve bushings attached to a respective bracket arm ofsaid support bracket.

21. In a swing motor mounting arrangement, a motor having a housing anda shaft mounted therein for relative rotation therewith, first andsecond ends of said shaft exposed at opposite ends of said housing, asupport bracket and a frame having a pair of overlapping bracket armspositioned at each axial end of said motor to extend laterally beyondsaid shaft and a pin extending through each pair of bracket arms, theinner end of each of said pins and a respective end of said shaftcoupled within each other.

22. The invention of claim 21 further comprising means forming anaxially extending threaded hole 7 through at least one of said pins toexpose the end of to move said coupled pin and shaft axially apartrelative to each other into uncoupled relationship.

23. The invention of claim 22 further comprising means forming anaxially extending threaded second hole on the coupled end of said shaft,disposed in axial alignment with and having a diameter smaller than thatof the threaded hole formed through the coupled pin, whereby a bolt canbe threadably mounted in said second threaded hole and pulled to movesaid coupled pin and shaft axially toward each other into coupledrelationship.

24. A method for disassembling :a vertically disposed motor from amounting arrangement, wherein each end of a shaft of said motor isattached to a pin means and is further attached to one bracket arm of apair of overlapping bracket arms positioned :at each end of said motor,said motor mounted between said pairs of bracket arms, comprising thesteps of first moving a first one of said pin means and a first end ofsaid shaft axially relative to each other to disconnect them,

second moving a second one of said pin means and a second end of saidshaft axially relative to each other to disconnect them, and

removing said motor from between said pairs of bracket arms. 25. Theinvention of claim 24 wherein said first and second moving stepscomprise moving the same pin means axially.

26. The invention of claim 25 wherein said first mov ing step comprisessimultaneously moving said second pin means and said shaft axiallyoutwardly away from said first pin means to disconnect said first pinmeans from the first end of said shaft and said. second moving stepcomprises further moving said second pin means axially outwardly awayfrom said first pin means to disconnect said second pin means from thesecond end of said shaft. 27. The invention of claim 24 wherein saidfirst moving step comprises moving said second pin means axiallyoutwardly away from said first pin means to disconnect said second pinmeans from the second end of said shaft and wherein said second movingstep comprises threadably mounting a bolt in said first pin means in endabutting relationship with the first end of said shaft and rotating saidbolt to move said shaft axially to disconnect the first end of saidshaft from said first pin means.

28. The invention of claim 24 wherein said first and second moving stepeach comprises moving said first and second pin means axially outwardlyaway from said motor to disconnect respective first and second ends ofsaid shaft from said first and second pin means.

29. A method for disassembling a first member from an axially alignedsecond member which is connected thereto by a spline connection, saidsecond member having a threaded hole formed therethrough, comprising thesteps of threadably mounting a bolt in said hole,

rotating said bolt to abut said first member with an end thereof, and

further rotating said bolt to move said first member axially relative tosaid second member until said member,

inserting a second bolt through the threaded hole formed in said secondmember,

threadably mounting said second bolt in said second hole, and

pulling said second bolt to draw said first member toward said secondmember until said spline connection is fully engaged to connect saidfirst and second members together.

# t a: s

1. A swing motor mounting arrangement comprising a motor having ahousing and a shaft mounted therein for relative rotation therewith,first and second ends of said shaft exposed at opposite ends of saidhousing, a support bracket and a frame normally positioned on oppositesides of said motor and having a pair of overlapping bracket armspositioned at each axial end of said motor to extend laterally beyondsaid shaft, and pivot means pivotally mounting each pair of saidoverlapping bracket arms together, including a pin means projectingthrough said pair of bracket arms and secured to only one of saidbracket arms and to a respective first or second end of said shaft. 2.The invention of claim 1 wherein the first and second ends of said shaftproject axially beyond respective ends of said housing.
 3. The inventionof claim 1 wherein said support bracket has the housing of said motorattached thereto and said frame constitutes the mast frame of a backhoehaving a boom and a vertically spaced, hydraulically actuated cylindereach pivotally mounted thereon.
 4. The invention of claim 1 wherein eachbracket arm of said frame is bifurcated and each bracket arm of saidsupport bracket is positioned within a respective one of the bifurcatedbracket arms, said pivot means further comprising annular bearing meanspivotally mounting each pin means on a respective bracket arm of saidsupport bracket.
 5. The invention of claim 1 wherein at least one ofsaid pin means is secured to a respective end of said shaft by a splineconnection.
 6. The invention of claim 5 wherein each of said pin meansis secured to a respective end of said shaft by a spline connection. 7.The invention of claim 1 wherein a pin means is secured to the first endof said shaft by bolt means extending axially through said pin means. 8.The invention of claim 1 wherein at least one of said pin meanscomprises an inner pin secured to the first end of said shaft and acylindrical outer pin circumventing said inner pin and attached to saidinner pin and to the bracket arm of said frame, said outer pin pivotallymounted on the bracket arm of said support bracket.
 9. The invention ofclaim 8 wherein said inner and outer pins each terminate at their outerends at an annular flange respectively attached to said outer pin and tothe bracket arm of said frame.
 10. The invention of claim 8 wherein theother one of said pin means constitutes a single pin secured to thesecond end of said shaft and to the other bracket arm of said frame. 11.The invention of claim 10 wherein said single pin is secured to thesecond end of said shaft by a spline connection and is pivotally mountedon the other bracket arm of said frame.
 12. The invention of claim 1wherein at least one of said pin means has means forming a threadedopening therethrough to expose a respective, adjacent end of said shaftfor permitting a bolt to be threadably attached therein and rotated tomove such pin means and said shaft axially relative to each other. 13.The invention of claim 12 further comprising means forming a threadedsecond opening in said adjacent end of said shaFt, axially aligned withand having a smaller diameter than said first-mentioned threadedopening, for permitting a bolt to be threadably attached therein forpulling said shaft and pin means together.
 14. The invention of claim 1wherein each of said pin means constitutes a single solid pin connectedby a spline connection to a respective end of said shaft.
 15. Theinvention of claim 14 wherein the inner end of each of said pins ishollow at its spline connection to said shaft.
 16. The invention ofclaim 14 wherein each end of said shaft is hollow at its splineconnection to a respective pin.
 17. The invention of claim 14 furthercomprising a separate bracket member attached to each of the bracketarms of said support bracket to overlie a respective end of said shaftto prevent axial movement of said shaft.
 18. The invention of claim 14wherein an outer end of each of said pins has a flange formed thereon,attached to each of the bracket arms of said support bracket.
 19. Theinvention of claim 14 further comprising on axially extending, annularbearing disposed between each of said pins and a respective bracket armof said frame.
 20. The invention of claim 19 further comprising anannular sleeve bushing disposed between each of said bearings and arespective pin, each of said sleeve bushings attached to a respectivebracket arm of said support bracket.
 21. In a swing motor mountingarrangement, a motor having a housing and a shaft mounted therein forrelative rotation therewith, first and second ends of said shaft exposedat opposite ends of said housing, a support bracket and a frame having apair of overlapping bracket arms positioned at each axial end of saidmotor to extend laterally beyond said shaft and a pin extending througheach pair of bracket arms, the inner end of each of said pins and arespective end of said shaft coupled within each other.
 22. Theinvention of claim 21 further comprising means forming an axiallyextending threaded hole through at least one of said pins to expose theend of said shaft coupled thereto whereby a bolt can be threadablymounted in said threaded hole and rotated to move said coupled pin andshaft axially apart relative to each other into uncoupled relationship.23. The invention of claim 22 further comprising means forming anaxially extending threaded second hole on the coupled end of said shaft,disposed in axial alignment with and having a diameter smaller than thatof the threaded hole formed through the coupled pin, whereby a bolt canbe threadably mounted in said second threaded hole and pulled to movesaid coupled pin and shaft axially toward each other into coupledrelationship.
 24. A method for disassembling a vertically disposed motorfrom a mounting arrangement, wherein each end of a shaft of said motoris attached to a pin means and is further attached to one bracket arm ofa pair of overlapping bracket arms positioned at each end of said motor,said motor mounted between said pairs of bracket arms, comprising thesteps of first moving a first one of said pin means and a first end ofsaid shaft axially relative to each other to disconnect them, secondmoving a second one of said pin means and a second end of said shaftaxially relative to each other to disconnect them, and removing saidmotor from between said pairs of bracket arms.
 25. The invention ofclaim 24 wherein said first and second moving steps comprise moving thesame pin means axially.
 26. The invention of claim 25 wherein said firstmoving step comprises simultaneously moving said second pin means andsaid shaft axially outwardly away from said first pin means todisconnect said first pin means from the first end of said shaft andsaid second moving step comprises further moving said second pin meansaxially outwardly away from said first pin means to disconnect saidsecond pin means from the second end of said shaft.
 27. The invention ofclaim 24 wherein said first moving step comprises moving said second pinmeans axially outwardly away from said first pin means to disconnectsaid second pin means from the second end of said shaft and wherein saidsecond moving step comprises threadably mounting a bolt in said firstpin means in end abutting relationship with the first end of said shaftand rotating said bolt to move said shaft axially to disconnect thefirst end of said shaft from said first pin means.
 28. The invention ofclaim 24 wherein said first and second moving step each comprises movingsaid first and second pin means axially outwardly away from said motorto disconnect respective first and second ends of said shaft from saidfirst and second pin means.
 29. A method for disassembling a firstmember from an axially aligned second member which is connected theretoby a spline connection, said second member having a threaded hole formedtherethrough, comprising the steps of threadably mounting a bolt in saidhole, rotating said bolt to abut said first member with an end thereof,and further rotating said bolt to move said first member axiallyrelative to said second member until said first and second members aredisconnected from each other at said spline connection.
 30. Theinvention of claim 29 further comprising the step of reassembling saidfirst and second members by connecting them together at said splineconnection, said first member having a threaded second hole formedtherein which is axially aligned with and has a smaller diameter thanthe threaded hole formed through said second member, including the stepsof removing said first-mentioned bolt from said second member, insertinga second bolt through the threaded hole formed in said second member,threadably mounting said second bolt in said second hole, and pullingsaid second bolt to draw said first member toward said second memberuntil said spline connection is fully engaged to connect said first andsecond members together.